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Balancing Redox Reactions, Half Reactions

  • Oxidation is loss of electrons; reduction is gain of electrons

  • Rules for assigning ox. nos. include: elements = 0; H = +1; O = -2; sum of all ox.nos. = charge on species

  • Half-reactions are either ox. or red. Will include electrons as reagents – red. half-reaction – or products – ox. half-reaction

  • Add appropriate numbers of ox. and red. half reactions to cancel electrons and get whole reaction

  • In acid solution use H+ to remove O

  • In basic solution use H2O to remove O and make OH-

Balancing Redox Reactions, Half Reactions

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

Advanced Placement Chemistry